What type of joint is characterized by two pieces of metal meeting at a 90-degree angle?

• A. V-joint
• B. T-joint
• C. Corner joint
• D. Lap joint

Answer: (B)

The option indicating a T-joint is correct because this joint consists of two pieces of metal that meet at a 90-degree angle, resembling the letter "T." This configuration is commonly used in various welding applications where the strength and stability of the joint are essential, such as in frame construction and structural supports.

A T-joint is particularly useful for joining a vertical piece of metal to a horizontal piece, allowing for efficient load distribution and reinforcement. Welds in this joint configuration can take on different forms, including fillet welds, which are commonly used to connect the two pieces effectively.

In contrast to the T-joint, a V-joint involves edges being beveled and brought together at an angle, while a corner joint is formed when two pieces of metal meet on their edges at a corner, also at a 90-degree angle, but not as a true T. A lap joint consists of one piece of metal overlapping another, which does not match the 90-degree angle description. Understanding these distinctions is crucial for identifying joint types and their appropriate applications in welding.